Quartz | Oil falls about 21% in July, worst since October 2008 CNBC A higher U.S. oil rig count for a second week in a row added to the market's downside. Uncertainty ahead of key U.S. oil production and rig count data due later in the day also weighed on prices, despite a weaker dollar, which would normally support ... Oil posts worst decline in 2015 as rig count rise Low oil prices are lasting a lot longer than petro-rulers thought they would Oil Prices Fall to Multi-Month Lows as US Rig Count Rises |